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-
- >Newsgroups: comp.infosystems.www
- >Path: ora.com!raisch
- >From: raisch@ora.com (Rob Raisch)
- >Subject: <TITLE>Current Server Work at O'Reilly....</TITLE>
- >Message-ID: <C882F3.LxH@ora.com>
- >Organization: O'Reilly & Associates, Inc.
- >Date: Sun, 6 Jun 1993 22:57:02 GMT
-
- We have a project which will use WWW to deliver a product from ORA to
- users who have 'subscribed.' This will be a free product, but we will need
- to collect information from the user-base to be able to generate demographics
- which will ultimately pay for the project (we hope.) (BTW, can't talk about
- it, wait for the 'official' announcement.)
-
- I've made modifications to the NCSA server code to support two features
- of the new HTTP protocol spec which will allow us to log who is accessing this
- 'product.' I've added support for the 'From:' and 'User_Agent:' fields in
- server queries to know who is asking and what they are using to retrieve.
-
- It has occured to me that there are some decisions a server might make,
- given a very little information regarding the browser the user is using.
-
- I would like to propose the following format for the 'User_Agent:'
- field, and see what people think:
-
- User_Agent: NAME VERSION CAPABILITIES
-
- Where the name and version would be defined by the browser maker,
- and the CAPABILITIES would come from a list like:
-
- TEXT (does this really need to be said?)
- INLINE_GIF (gifs inlined ala mosaic)
- GIF,JPG,PS (various graphics)
- GHOSTVIEW
- MOUSE
- AUDIO,VIDEO (supports audio or videofiles)
- MAIL,NEWS,FTP (supports these local services)
- FAST (on an ETHER connection)
- SLOW (on a SLIP dialup)
- ... (many possible capabilities to be defined)
-
-
- The theory here is that documents can be rewritten 'on the fly' to
- reference only those capabilities which the user has at hand.
-
- Further assume that I have a method of managing documents locally which
- return portions of a document based on capability metrics.
-
- For example:
-
- I am a user, using Lynx on a VTxxx. When I make a request to the
- server, Lynx also sends:
-
- User_Agent: Lynx 1.06 TEXT MAIL NEWS
-
- since these are the capabilities which Lynx running on my host supports.
-
- The server then retrieves the following document
-
-